Your 3-year-old daughter, Noria, recently attended a birthday party, where she received a bag of colorful plastic toys. There were several animals, a few cars, and human figures. Noria asked whether she could play with her toys. After a few minutes, you noticed that she was putting them into groups (e. g., animals, cars, people, etc.). What cognitive ability would Piaget say Noria is demonstrating?

A. categorizing
B. memorizing
C. practicing fine motor skills
D. sorting

Before they can be published, scientific papers must be peer-reviewed. this means that: a) some other scientific experts read the papers and guarantee that they are true. b) some other scientific experts read the papers and provide quality control by eliminating many mistakes. c) an editor reads the papers, to make sure that all the semicolons are in the correct places. d) everyone in the world is given the opportunity to comment on the papers through a specially maintainedblog. e) government bureaucrats read the papers, to be sure that the papers do not insult the political positions ofthe current officeholders.